The Riverbank Filtration Tunnel and Pump Station in Louisville, Kentucky is an innovative project to provide clean drinking water to the Louisville metro area. The project involves using the natural filtration of a sand and gravel aquifer beneath the Ohio River to provide an economical source of clean water. Four 13-ft diameter caissons approximately 100-ft deep form the collecter wells, and each has a number of horizontal ‘laterals’ consisting of approximately 200 to 250-ft long 12-in steel well screens. The water is then collected into a 4-ft drop shaft into a 10-ft diameter tunnel constructed by Tunnel Boring Machine that conveys the water to the pump station. Check out the ASCE link below to view a video overview of the project. The Tunnel Boring Magazine Cover Story 04-09 link has more info on the project as well. [Source: ASCE. Image: Tunnel Boring Magazine Cover Story 04-09]
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The Devil’s Slide Tunnel Project was originally scheduled to open at the end of 2012, but it has been delayed slightly to an early 2013 opening. If you look at some recent photos, you can hardly tell that there is anything left to finish. I’ve been following this project since it started, since to me it represents the essence of geoengineering, with important roles played by geotechnical engineers, geological engineers, hydrogeologists, and of course geotechnical contractors and tunneling specialists. I thought it would be interesting to list a few of the posts I’ve written about the project over the years and present a bit of information I only recently learned. Click through for more. [Image: kxyoung on Flickr]